I was wondering whether to use the -abil/-ebil or just geniþ zaman here. Wouldn´t -abil/-ebil be more for asking about ability? As in: "Am I capable of speaking to Ali?"

In this example he´s asking permission to speak to somebody, so wouldn´t geniþ zaman be more appropriate?

I´d appreciate it if you could explain this further.

Anytime darling, thanks for the pina colada too, I feel good already

Coming right up ...

 Awwww, much, much better.

Thanks Darling, I hope you didn´t put too much pineapple juice and not enough rum in there, it looks kind of too yellow  

Priceless!

Glad to hear it´s working, can´t wait to see the pics

You got pina colada?

"Bu evi istedim" is correct, the other one isn´t (as far as I can tell, but you know I´m just learning too .

To say this was the house I wanted you´d say: Bu istediðim evdi.

So you finally decided to serve some drinks? My throat has been dry all day! lol

I don´t think you can use "i" for "the" in this sentence, only as a direct object of a verb.

In Enlish, you wouldn´t say: "This is the very nice house" either, you´d use "a", so I think your first translation is the best. If you want to say "The house is nice", you´d just skip "bir" and say  "Bu ev çok güzel." or "Ev çok güzel."